From Midnight Scans:
On Maika's 16th birthday, the girl is given a Shikigami named Homura, as it is the Shikigamis' job to protect the Onmyouji. But who would have guessed that Homura gains his powers from having sex...? And that the perverted Homura keeps making Maika's heart race...!?

The series Moe Moe Darling has been licensed, it is not available in Manga Fox.